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lost80s 02-21-2008 05:01 PM

Sub Floor Repair Question
I had some subfloor repaired, but there are gaps between the pieces of plywood.. Can I fill these with regular wood filler? I am having new flooring installed next week, and Im not sure what type of "minor repairs" the company putting the floor in will and will not do. I don't want them to up charge me for this...

redline 02-21-2008 05:10 PM

How large are the gaps?

it is normal to have a gap for expansion.

AtlanticWBConst. 02-21-2008 06:04 PM

Gaps in floor sheathing are not filled with wood filler. The main reason is that this is a floor, with walking, movement, and some deflection. Wood filler will "crumble" and "pop-out".

Two Questions:


What kind of flooring are you planning on having installed?

lost80s 02-21-2008 06:09 PM

The gap is larger than the original subflooring.. thats what made me think it was wrong. The are only about 1/2"

Thanks for the advice - I Love this site! I am having laminate installed in the bathrooms and some sort of hardwood (lamniate hardwood I think) inthe living and kitchen area.

AtlanticWBConst. 02-21-2008 06:22 PM

To fill the gaps, you can use a floor leveling compound, designed for use with wood.

Bud Cline 02-21-2008 07:46 PM

If you have 1/2" gaps in your subfloor seams you better STOP right there until you find out why those gaps are there. A gap of 1/2" wouldn't leave very much subfloor bearing on the floor joists.:no:

If you repair those gaps yourself be sure to tell the flooring company what you did so they can adjust your warranty to exclude any responsibility for an overflexing substrate that ruins their work.:).

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